The invention discloses an energy distribution optimization method for a hybrid energy storage system of an electric vehicle, and the method comprises the steps: determining a current traffic flow type according to traffic flow characteristic parameters, and correspondingly determining an energy distribution mode of the hybrid energy storage system: under the condition of congestion flow, a power-type battery independently provides electric energy required by driving, and the energy-type battery charges the power-type battery; under the current limiting condition, the power type battery and the energy type battery jointly provide electric energy required by driving; when the vehicle is accelerated under the free flow condition, the energy distribution mode which is the same as that under the limited flow condition is adopted; after the vehicle reaches the expected vehicle speed, the energy type battery independently provides electric energy required by driving; wherein the charging power, the charging SOC upper limit and the common output power distribution ratio of the energy type battery to the power type battery are adjusted according to the driving style of a driver. The system efficiency is improved as much as possible while the service life of the lithium ion battery is prolonged, and optimal energy distribution is achieved.

    本发明公开了一种电动汽车混合储能系统能量分配优化方法,根据交通流特征参数确定当前交通流类型,相应确定混合储能系统的能量分配方式:拥堵流情况下,功率型电池单独提供行驶需求电能,且能量型电池对功率型电池充电;限制流情况下,功率型与能量型电池共同提供行驶需求电能;在自由流情况下的车辆加速时,采用与限制流情况相同的能量分配方式;车辆达到期望车速后,能量型电池单独提供行驶需求电能;其中,能量型电池对功率型电池的充电功率、充电SOC上限、共同输出的功率分配比,均根据驾驶员的驾驶风格进行调整。本发明在延长锂离子电池使用寿命的同时尽可能提高系统效率,实现最优的能量分配。


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    Title :

    Energy distribution optimization method for hybrid energy storage system of electric vehicle


    Additional title:

    一种电动汽车混合储能系统能量分配优化方法


    Contributors:
    HU LIN (author) / TIAN QINGTAO (author) / HUANG JING (author) / ZHANG DONGJIE (author) / TANG ZUOKAI (author)

    Publication date :

    2024-03-05


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / G06Q Datenverarbeitungssysteme oder -verfahren, besonders angepasst an verwaltungstechnische, geschäftliche, finanzielle oder betriebswirtschaftliche Zwecke, sowie an geschäftsbezogene Überwachungs- oder Voraussagezwecke , DATA PROCESSING SYSTEMS OR METHODS, SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTING PURPOSES



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